Featured Microscopist: Spike (M.I.) Walker

Amethystine Quartz Crystal

The surface of a facet of an amethystine quartz crystal. The objective was a 5.5x/0.15 NA achromatic objective with a Nomarski DIC prism and vertical illuminator (reflected light) utilizing crossed polarizers. Illumination was provided by a 12-volt, 100-watt tungsten-halide lamp. The camera system employed for photomicrography was a Reichert Zetopan with a Photoautomatic 35-millimeter camera. Film was Ektachrome 64. (16x)